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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/14285

Title: A new DOA-based factor graph geolocation technique for detection of unknown radio wave emitter position using the first-order Taylor series approximation
Authors: Aziz, Muhammad Reza Kahar
Anwar, Khoirul
Matsumoto, Tad
Keywords: CRLB
Factor graphs
Taylor series
Issue Date: 2016-08-18
Publisher: Springer
Magazine name: EURASIP Journal on Wireless Communications and Networking
Volume: 2016
Start page: 189
DOI: 10.1186/s13638-016-0683-4
Abstract: This paper proposes a new geolocation technique to improve the accuracy of the position estimate of a single unknown (anonymous) radio wave emitter. We consider a factor graph (FG)-based geolocation technique, where the input are the samples of direction-of-arrival (DOA) measurement results sent from the sensors. It is shown that the accuracy of the DOA-based FG geolocation algorithm can be improved by introducing approximated expressions for the mean and variance of the tangent and cotangent functions based on the first-order Taylor series (TS) at the tangent factor nodes of the FG. This paper also derives a closed-form expression of the Cramer-Rao lower bound (CRLB) for DOA-based geolocation, where the number of samples is taken into account. The proposed technique does not require high computational complexity because only mean and variance are to be exchanged between the nodes in the FG. It is shown that the position estimation accuracy with the proposed technique outperforms the conventional DOA-based least square (LS) technique and that the achieved root mean square error (RMSE) is very close to the theoretical CRLB.
Rights: © 2016 The Author(s)., Muhammad Reza Kahar Aziz, Khoirul Anwar, Tad Matsumoto, EURASIP Journal on Wireless Communications and Networking, 2016, 2016:189, DOI: 10.1186/s13638-016-0683-4. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
URI: http://hdl.handle.net/10119/14285
Material Type: publisher
Appears in Collections:b10-1. 雑誌掲載論文 (Journal Articles)

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